What is HDPE material

High density polyethylene (HDPE) is a white powder or granular products. Non-toxic, odorless, crystallinity of 80% ~ 90%, softening point of 125 ~ l 35 ℃, the use of temperature up to 100 ℃; hardness, tensile strength and creep is better than low-density polyethylene; abrasion resistance, electrical insulation, toughness and cold resistance is better.

Good chemical stability, at room temperature, insoluble in any organic solvents, acid, alkali and various salts corrosion; film permeability to water vapor and air is small, low water absorption; aging resistance is poor, resistance to environmental stress cracking than low-density polyethylene, especially thermal oxidation will make its performance decline, so the resin must be added to the antioxidant and ultraviolet absorber to improve the shortfalls in this area. Insufficient.

Expanded information:

The properties of polyethylene depend on how it is polymerized. High-density polyethylene (HDPE) is produced by Ziegler-Natta polymerization under catalytic conditions of organic compounds at moderate pressure (15-30 atm).

Polyethylene molecules polymerized under these conditions are linear and have long molecular chains with molecular weights in the hundreds of thousands. If it is under high pressure (100-300MPa), high temperature (190-210C), peroxide-catalyzed conditions of free radical polymerization, the production of low-density polyethylene (LDPE), which is branched-chain chemical structure.